EXACT GROUND-STATES OF GENERALIZED HUBBARD MODELS

被引：71

作者：

DEBOER, J ^{[1
]}

SCHADSCHNEIDER, A ^{[1
]}

机构：

[1] UNIV COLOGNE,INST THEORET PHYS,D-50937 COLOGNE,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 23期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.75.4298

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a simple method for the construction of exact ground states of generalized Hubbard models in arbitrary dimensions. This method is used to derive rigorous criteria for the stability of various ground state types, like the eta-pairing state, or Neel and ferromagnetic states. Although the approach presented here is much simpler than the ones commonly used, it yields better bounds for the region of stability.

引用

页码：4298 / 4301

页数：4

共 20 条

[1]

ALIGIA AA, 1994, PHYS REV LETT, V73, P2240

[2] HUBBARD AND ANDERSON MODELS ON PEROVSKITE-LIKE LATTICES - EXACTLY SOLVABLE CASES [J].

BRANDT, U ;

GIESEKUS, A .

PHYSICAL REVIEW LETTERS, 1992, 68 (17) :2648-2651

[3] ETA-PAIRING AS A MECHANISM OF SUPERCONDUCTIVITY IN MODELS OF STRONGLY CORRELATED ELECTRONS [J].

DEBOER, J ;

KOREPIN, VE ;

SCHADSCHNEIDER, A .

PHYSICAL REVIEW LETTERS, 1995, 74 (05) :789-792

[4]

DEBOER JWM, IN PRESS

[5] MATRIX PRODUCT GROUND-STATES FOR ONE-DIMENSIONAL SPIN-1 QUANTUM ANTIFERROMAGNETS [J].

KLUMPER, A ;

SCHADSCHNEIDER, A ;

ZITTARTZ, J .

EUROPHYSICS LETTERS, 1993, 24 (04) :293-297

[6]

KOLLAR M, COMMUNICATION

[7]

MONTORSI A, CONDMAT9502027 REP

[8] OFF-DIAGONAL LONG-RANGE ORDER - MEISSNER EFFECT AND FLUX-QUANTIZATION [J].

NIEH, HT ;

SU, G ;

ZHAO, BH .

PHYSICAL REVIEW B, 1995, 51 (06) :3760-3764

[9]

OVHINNIKOV AA, 1994, J PHYS CONDENS MATT, V6, P11057

[10]

OVHINNIKOV AA, 1993, MOD PHYS LETT B, V7, P1397

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